Double-ended box wrench



FIG. 1 is a top plan view of a double-ended box wrench showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a side elevational view thereof, the opposite side being a mirror image;

FIG. 4 is a right end elevational view thereof;

FIG. 5 is a left end elevational view thereof.

The other side view of the design is symmetrical to the side shown in FIG. 3. 

The ornamental design for a double-ended box wrench, as shown and described. 